•
CTS = Clear to send
•
GND = Signal / Chassis Ground
The cable shield is to be earthed at both line ends. For extremely EMC-prone environments, the earth may be
connected via a separate individually shielded wire pair to improve immunity to interference.
Table 3-20
The assignments of the D-subminiature and RJ45 connector for the various interfaces
Pin No.
Operator
interface
RS232
RS485
PROFIBUS FMS Slave, RS485
DNP3.0 RS485
Ethernet
EN 100
PROFIBUS DP Slave, RS485
1
Shield (with shield ends electrically connected)
Tx+
2
RxD
RxD
-
-
-
Tx-
3
TxD
TxD
A/A’ (RxD/TxD-N)
B/B’ (RxD/TxD-P)
A
Rx+
4
-
-
-
CNTR-A (TTL)
RTS (TTL level)
-
5
GND
GND
C/C’ (GND)
C/C’ (GND)
GND1
-
6
-
-
-
+5 V (max. load < 100 mA)
VCC1
Rx-
7
RTS
RTS
-
1)
-
-
-
8
CTS
CTS
B/B’ (RxD/TxD-P)
A/A’ (RxD/TxD-N)
B
-
9
-
-
-
-
-
Non Exis-
tent
1)
Pin 7 also carries the RTS signal with RS232 level when operated as RS485 Interface. Pin 7 must therefore
not be connected!
RS485-Termination
The RS485 interface is capable of half-duplex service with the signals A/A' and B/B' with a common relative
potential C/C' (GND). Make sure that only the terminating resistors at the last device on the bus are connected,
but not for all other devices on the bus. The jumpers for the terminating resistors are on the interface module
(see
or
) of directly on the C-CPU-2 (see
tors can also be connected externally (e.g. to the terminal block, see
). In this case, the terminating
resistors located on the module must be disabled.
If the bus is extended, make sure again that only the terminating resistors at the last device on the bus are
connected.
Time Synchronization Interface
It is optionally possible to process 5 V, 12 V or 24 V time synchronization signals, provided that these are
connected to the inputs named in the following table.
Table 3-21
D-subminiature connector assignment of the time synchronization interface
Pin No.
Description
Signal meaning
1
P24_TSIG
Input 24 V
2
P5_TSIG
Input 5 V
3
M_TSIG
Return line
4
-
1)
-
1)
5
SHIELD
Shield potential
6
-
-
7
P12_TSIG
Input 12 V
8
P_TSYNC
1)
Input 24 V
1)
9
SHIELD
Shield potential
1)
Assigned, but cannot be used
Mounting and Commissioning
3.2 Checking Connections
204
SIPROTEC 4, 7VK61, Manual
C53000-G1176-C159-5, Edition 05.2018
Содержание SIPROTEC 4 7VK61
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